Naphthalene analogue and preparation method thereof from ranunculus davidii
A technology of analogues and ranunculus, applied in the field of preparation of naphthalene analogues in ranunculus thorns
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[0032] In a second aspect, the present invention provides a method for preparing the naphthalene analog from buttercup thorn, comprising the following steps:
[0033] Pulverize Buttercup thorn, extract with ethanol, and concentrate the extract to obtain the total extract;
[0034] The total extract was separated by silica gel column chromatography, and gradient elution was carried out by petroleum ether-ethyl acetate system;
[0035] The obtained second component was repeatedly chromatographed on silica gel in a petroleum ether-ethyl acetate system to obtain the naphthalene analogue;
[0036] The volume ratio of petroleum ether and ethyl acetate in the petroleum ether-ethyl acetate system is 1.2:8.8.
[0037] In some embodiments, the crushed Buttercup thorn has a particle size of 20-40 mesh.
[0038] In some embodiments, the crushed Buttercup thorn has a particle size of 30-40 mesh.
[0039] In some embodiments, 2-5L of absolute ethanol is used for extraction per kilogram o...
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